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Study of lateral shocks observed during fork truck and pallet jack operations for the handling of palletized loads
Author(s) -
Rodriguez Hector,
Singh S. Paul,
Burgess Gary
Publication year - 1994
Publication title -
packaging technology and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.365
H-Index - 50
eISSN - 1099-1522
pISSN - 0894-3214
DOI - 10.1002/pts.2770070407
Subject(s) - truck , pallet , fork (system call) , shock (circulatory) , acceleration , structural engineering , engineering , shock tube , automotive engineering , mathematics , shock wave , physics , medicine , classical mechanics , aerospace engineering
This study measured the lateral impact levels that occur when fork trucks are used to handle palletized loads. The existing ASTM‐D4003 standard on pallet marshalling recommends a 40 G, 10 ms shock or a 10G. 50ms shock to simulate impacts on pallet loads due to fork truck equipment. This study investigated the validity of these levels since no previous studies documenting these levels is provided in the ASTM standards. 5 A set of ten impacts were conducted in the two different scenarios using boxes, bins and drums. These scenarios represent a palletized load on a fork truck impacting a similar stationary pallet load and an empty fork truck impacting a pallet load. Results are presented for each category of impacts performed in terms of average and maximum levels measured. The average peak acceleration for the data collected was 36 G and the average duration of impact was 4.3 ms. An analysis describing the limiting conditions for the shock acceleration G and the duration T as a function of the fork truck weight, impact speed, pallet weight and impact condition was determined. This showed that the impacts should have the product of maximum shock (in G) and duration ( T ) mms lying between 37.2 and 368 for half‐sine shocks.